package week2;

public class report2 {
    public static void main(String[] args){
        double PI=3.14;
        double R1=1.2;
        double R2=2.5;
        double R3=6;
        double area1=PI*R1*R1;
        double area2=PI*R2*R2;
        double area3=PI*R3*R3;
        System.out.println("半径为" + R1 + "的圆的面积是：" + area1);
        System.out.println("半径为" + R2 + "的圆的面积是：" + area2);
        System.out.println("半径为" + R3 + "的圆的面积是：" + area3);
    }
}
